Abstract: The invention relates to a femoral hip-joint endoprosthesis having a shaft to be inserted into the medullary cavity (4) of the femur (1) and a support plate (7), which terminates the shaft proximally and the under surface (12) of which is provided for support on the resection surface (16) of the bone. The overall axis (6) of the resection surface is inclined. The prerequisites for the transfer of forces from the prosthesis to the bone are improved when the under surface (12) and the resection surface (16), which is prepared to be of the same shape, are formed so that the medial part of the under surface includes an angle with the axis of the femur which is, on average, larger than its lateral part. A cylindrical shape of the two surfaces witha cylindrical axis running from anterior to posterior, or a spherical shape, are particularly advantageous. Furthermore, it is advantageous to form the under surface as a surface of revolution about a rotation axis running transverse to the under surface.